A perforated plate has holes of diameter dh arranged in a pitch ph. Each hole has a tube of I.D. dt passing through it. The ligament efficiency is given by
A. $$\frac{{{{\text{p}}_{\text{h}}} - {{\text{d}}_{\text{h}}}}}{{{{\text{p}}_{\text{h}}}}}$$
B. $$\frac{{{{\text{p}}_{\text{h}}} - \left( {\frac{{{{\text{d}}_{\text{h}}}\,{{\text{d}}_{\text{t}}}}}{2}} \right)}}{{{{\text{p}}_{\text{h}}}}}$$
C. $$\frac{{{{\text{p}}_{\text{h}}} - {{\text{d}}_{\text{t}}}}}{{{{\text{p}}_{\text{h}}}}}$$
D. $$\frac{{{{\text{p}}_{\text{h}}} - {{\text{d}}_{\text{h}}}}}{{{{\text{d}}_{\text{h}}}}}$$
Answer: Option C
This Question Belongs to Chemical Engineering >> Process Equipment And Plant Design
Width and depth of grooves in the tube sheet holes normally are __________ inch respectively.
A. $$\frac{1}{8}$$ and $$\frac{1}{{64}}$$
B. $$\frac{1}{{64}}$$ and $$\frac{1}{8}$$
C. $$\frac{1}{2}$$ and 8
D. $$\frac{1}{2}$$ and 5
A. Less than
B. 1.25-1.50 times
C. 2.5 times
D. One-fourth of
Value of Peclet number = 0, is the representative of
A. Laminar flow
B. Complete back mixing
C. Plug flow
D. Eddy diffusivity = 0
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